1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
51 	t = btf__type_by_id(kern_btf, info->btf_vmlinux_value_type_id);  in get_kern_struct_ops_name()
52 	st_ops_name = btf__name_by_offset(kern_btf, t->name_off);  in get_kern_struct_ops_name()
72 		p_err("can't find bpf_map_info from btf_vmlinux");  in get_map_info_type_id()
78 	map_info_alloc_len = map_info_type->size;  in get_map_info_type_id()
117  * It returns the fd in "*res_fd" and map_info in "*info".
118  * In the very first iteration, info->id should be 0.
119  * An optional map "*name" filter can be specified.
120  * The filter can be made more flexible in the future.
121  * e.g. filter by kernel-struct-ops-name, regex-name, glob-name, ...etc.
125  *	  The caller can continue to call get_next in the future.
126  *     0: No struct_ops map is returned.
128  *    -1: Error and the caller should abort the iteration.
133 	__u32 id = info->id;  in get_next_struct_ops_map()
134 	int err, fd;  in get_next_struct_ops_map()  local
141 			p_err("can't get next map: %s", strerror(errno));  in get_next_struct_ops_map()
142 			return -1;  in get_next_struct_ops_map()
145 		fd = bpf_map_get_fd_by_id(id);  in get_next_struct_ops_map()
146 		if (fd < 0) {  in get_next_struct_ops_map()
149 			p_err("can't get map by id (%u): %s",  in get_next_struct_ops_map()
151 			return -1;  in get_next_struct_ops_map()
154 		err = bpf_map_get_info_by_fd(fd, info, &info_len);  in get_next_struct_ops_map()
156 			p_err("can't get map info: %s", strerror(errno));  in get_next_struct_ops_map()
157 			close(fd);  in get_next_struct_ops_map()
158 			return -1;  in get_next_struct_ops_map()
161 		if (info->type == BPF_MAP_TYPE_STRUCT_OPS &&  in get_next_struct_ops_map()
162 		    (!name || !strcmp(name, info->name))) {  in get_next_struct_ops_map()
163 			*res_fd = fd;  in get_next_struct_ops_map()
166 		close(fd);  in get_next_struct_ops_map()
172 	if (res->nr_errs || (!res->nr_maps && must_have_one_map))  in cmd_retval()
173 		return -1;  in cmd_retval()
179 typedef int (*work_func)(int fd, const struct bpf_map_info *info, void *data,
184  * Then call "func(fd, info, data, wtr)" on each struct_ops map found.
192 	int fd, err;  in do_search()  local
202 	while ((err = get_next_struct_ops_map(name, &fd, info, info_len)) == 1) {  in do_search()
204 		err = func(fd, info, data, wtr);  in do_search()
207 		close(fd);  in do_search()
220 		p_err("no struct_ops found for %s", name);  in do_search()
225 		 * However, "-j" is enabled and there is no errs here,  in do_search()
243 	int fd;  in do_one_id()  local
252 	fd = bpf_map_get_fd_by_id(id);  in do_one_id()
253 	if (fd < 0) {  in do_one_id()
254 		p_err("can't get map by id (%lu): %s", id, strerror(errno));  in do_one_id()
265 	if (bpf_map_get_info_by_fd(fd, info, &info_len)) {  in do_one_id()
266 		p_err("can't get map info: %s", strerror(errno));  in do_one_id()
271 	if (info->type != BPF_MAP_TYPE_STRUCT_OPS) {  in do_one_id()
272 		p_err("%s id %u is not a struct_ops map", info->name, info->id);  in do_one_id()
282 	if (func(fd, info, data, wtr))  in do_one_id()
288 		 * However, "-j" is enabled and there is no errs here,  in do_one_id()
299 	close(fd);  in do_one_id()
319 static int __do_show(int fd, const struct bpf_map_info *info, void *data,  in __do_show()  argument
324 		jsonw_uint_field(wtr, "id", info->id);  in __do_show()
325 		jsonw_string_field(wtr, "name", info->name);  in __do_show()
330 		printf("%u: %-15s %-32s\n", info->id, info->name,  in __do_show()
356 static int __do_dump(int fd, const struct bpf_map_info *info, void *data,  in __do_dump()  argument
361 	const struct btf *kern_btf = d->btf;  in __do_dump()
366 	/* note: d->jw == wtr */  in __do_dump()
368 	kern_btf = d->btf;  in __do_dump()
374 					  info->btf_vmlinux_value_type_id);  in __do_dump()
376 					      struct_ops_type->name_off);  in __do_dump()
377 	value = calloc(1, info->value_size);  in __do_dump()
380 		return -1;  in __do_dump()
383 	if (bpf_map_lookup_elem(fd, &zero, value)) {  in __do_dump()
384 		p_err("can't lookup struct_ops map %s id %u",  in __do_dump()
385 		      info->name, info->id);  in __do_dump()
387 		return -1;  in __do_dump()
397 	btf_dumper_type(d, info->btf_vmlinux_value_type_id, value);  in __do_dump()
423 		return -1;  in do_dump()
428 			p_err("can't create json writer");  in do_dump()
429 			return -1;  in do_dump()
448 static int __do_unregister(int fd, const struct bpf_map_info *info, void *data,  in __do_unregister()  argument
453 	if (bpf_map_delete_elem(fd, &zero)) {  in __do_unregister()
454 		p_err("can't unload %s %s id %u: %s",  in __do_unregister()
455 		      get_kern_struct_ops_name(info), info->name,  in __do_unregister()
456 		      info->id, strerror(errno));  in __do_unregister()
457 		return -1;  in __do_unregister()
461 	       get_kern_struct_ops_name(info), info->name,  in __do_unregister()
462 	       info->id);  in __do_unregister()
492 		return -1;  in pin_link()
519 		p_err("can't mount bpffs for pinning");  in do_register()
520 		return -1;  in do_register()
529 		return -1;  in do_register()
535 		return -1;  in do_register()
544 			p_err("can't register struct_ops %s: %s",  in do_register()
556 			p_info("Registered %s but can't find id: %s",  in do_register()
570 			p_err("Registered %s but can't find link id: %s",  in do_register()
576 			p_err("can't pin link %u for %s: %s",  in do_register()
594 		return -1;  in do_register()
597 		p_err("no struct_ops found in %s", file);  in do_register()
598 		return -1;  in do_register()
624 		bin_name, argv[-2]);  in do_help()